[10a-E201-1~11] 3.11 Nanoscale optical science and near-field optics

11:45 AM - 12:00 PM JST(2:45 AM - 3:00 AM UTC)

[10a-E201-11] Evaluation of the reflectance spectrum of a reflective plasmonic Fano sensor using Fano edge.

〇Taiyo Nabuchi¹, Yuna Betto¹, Takeshi Kato^2,3, Kazumasa Hiramatsu¹, Atsushi Motogaito¹ (1.Grad. Sch. Eng., Mie Univ., 2.IMaSS, Nagoya Univ., 3.Grad. Sch. Eng., Nagoya Univ.)

Keywords:

Plasmonic Fano Sensor,Surface Plasmon Resonance,Fano Edge

In this study, the reflection spectrum of a reflective plasmonic Fano sensor consisting of a one-dimensional Au grating fabricated on a sapphire substrate was evaluated. Focusing on the sharp drop angle in the reflectance spectrum caused by Fano resonance, referred to as the Fano edge, the experimental results were compared with calculations based on Rigorous Coupled-Wave Analysis (RCWA). A two-layer structure with a period of 192.31 nm was fabricated and characterized. The Fano edge was observed at 17.2° in the simulation and 17.1° in the experiment, showing good agreement between the two results. These findings demonstrate the effectiveness of using the Fano edge for performance evaluation of reflective plasmonic Fano sensors.